Finding the Third Proportional to 19.97 and 42.89

Step by Step Solution

1. Step 1: Write the proportion equation
   19.97 : 42.89 = 42.89 : x
2. Step 2: Convert to fraction form
   19.97/42.89 = 42.89/x
3. Step 3: Cross multiply
   19.97x = 42.89 × 42.89
4. Step 4: Simplify right side
   19.97x = 1,839.61
5. Step 5: Solve for x
   x = 1,839.61/19.97
6. Step 6: Final answer
   x = 92.12